Double lamp socket



Aug. 16, 1921. y 1,638,935

W. ILE

DOUBLE LAMP SOCKET Filed May 9, 1925 Patented `ug.A 16, V1927.

UNITED STATES y 1,638,935 PATENT OilillflCE.

WILLIAM ILE, or JAcxsoN, MICHIGAN, Alsslonon To vlmYNoLns srRING coMiANY, or

JACKSON, marleen` #CORPQBATIQNQF Dramma i noUiisLE namrsocixncr. e

applicati@ mea nay s, 1,925. seran in.y 29,146.

The invention relates toa double lamp socket.

The object of the present invention is to improve the construction of double or two way lamp sockets of the ordinary type and to provide a simple' .practical and eflicient double socket of'v strong, durable and comparatively inexpensive construction provided with-a body portion consisting of' a single piece of molded phenol condensation product or other insulating material and havlng'embedded therein the 'conductors for the'screw shell Contacts and the center contacts whereby the same will'be firmlyanchored and will materially `facilitate both the assembling ot the parts of the double socket and the molding ofthe bakel-ite vor other insulating material.- 1

lVith these and other objects vin view, the invention consists in the construction and novel combination and arrangement of parts hereinafter fully described, illustrated in the accompanying drawings and pointed out in the claims hereto appended, it being'understood-that various changes in the forni, proportion and minor details of construction, 'within thel scope ,of the claims, ma. resortedto without departing from vt e spirit or sacrificing any of the advantages of' the invention. y

In the drawingsz` e f Figure 1 is a vertical longitudinal sectional view/ofthe double lamp lsocket equipped with al detachable screw plug vso as Vto provide aftwo in one socketfto vscrew .an ordinary socket lor receptacle or to present projecting terminals, blades'or fingers for insertion in apertures of a fixture to engage interiorly arranged contacts or terminals thereof. .i ,A i

Fig. 2 is an end view ofone ofthe sockets the 4'shell contact, center terminal and insulating disk ybeing removed.

' F ig. 3 ,isa similar view of the other socket.V`

F ig. lis a plan view ofthe :double socket the screw plug being removed.v e

Fig. 5 is a detail viewgof one yof the screw shell contacts. p Y

In the accompan ing Vdrawing in which vis illustrated the pre erred embodiment of Pthe invention ,the double `lamp socket comprises in its construction an insulating body Inconsisting of a single vpiece Vof molded insulating-material and comprising a Isolid substantially cylindrical body portion `2 and lower hollow cylindrical sockets 3 and 4 diverging downwardly and connected at their adjacent walls by an integral solid upwardly taperediconnectmg portion 5 forming adividing wall 'ass clearly illustrated in Fig. 1 of the drawing. The cylindricaly solid top ,portion is exteriorly reduced-to provide a shoulder (Sand to receive a lower baseportion 7 ofa s/crewplug 8 whichis detachably secured to the cylindrical portion by the means hereinafter f described to enable the double socketl toscrew in to an ordinary sockl. et or receptacle and also to permit the double soicketwheny lthe said pl'u'gis removed to be applied Vto a differentfcharacter -or xture having apertures for thereception of projecting fingers or blades of'terin'inal conductor bars 9 and 10 which are embedded in the solid cylindrical portion of they body 1 at opposite sides ofk a centrally arranged bushing 1l which isengaged by al `screw or bolt' 12 of the screwy lug 8K. 'The bushing 11 which` is interior threaded is'provided at the inner edge with a flange 13 .forming a 'headand adapted to ysecurely anchor the bushing in the solid'cylindrical portion of thevbody. The bushing is mold? ed in the and the flangeimay have either a smooth or corru ated peripheryQcorrugations beingiadapted to vprevent any liability of the bushing''working loose and rotating when the screw or boltis rotated. The screw or bolt 12 passes centrally ,throughl the screw plug and is provided at its outer end with a polygonal headadated to be engaged a wrench'prothertoo for screwing the vholt vinto the bushing and for. removing it therefrom. The 'double socket may be equipped with a screw plug lor the latter may be omittedrand' when so equipped the device constituesa two in one socket or fixture.

The terminal conductor bar 9 is strai ht as means for electrically connecting the same y besides operating has a secure anchoring means for positively and irmly holding the straight terminal conductor bar 9 in the material ot the socket body. The ends ot the center contact connecting yoke are headed as shown by a suitable tool and the center contacts consist ot' a strip oimetal doubled to torm upper and lower portions, the lower portion being provided with a cup-shaped end 17 'for contacting with a lamp. The lower or outer portion oi" the center contact 16' is adapted to be bent out of the way while the end of the connecting yoke is being headed and it may be readily bent back into position and arranged to insure its proper contact with a lamp.

The other terminal conductor bar consists yof a straight vertical upper portion, an

Y intermediate inclined portion 18 and a Figs. 1 and 2 of the drawing. The angular` straight inclined terminal contactportion 19 which is exposed at and arranged in Hush relation with the interior of the socket 3 at j the top wall thereof as clearly shown in ly related upper portion, lower portion and intermediate portion ot the terminal conductor bar 10 form and secure anchoring means for firmly holding the conductor bar in the molded material of the socket body. The upper orouter portions of the terminal conductor bars project above the cylindrical top portion of the socket body and form proj ecting contact lingers or blades adapted to enter the apertures 20 and 21 of the plug f 8 and provided with perforations 22 for engagement with protuberances 23 of interiorly arranged contacts or terminals 24 and 25 of the screw plug or similar electrical connections of an analogous fixture.

Each of the sockets 3 and 4 is provided at its top wall adjacent the dividing wall or portion 5 with an arcuate rib 26 projecting from the top wall of each of the said sockets 3 and 4 and adapted to fit in a curved slot 27 in the flange 28 of the screw shell contacts 29 and 30 of the sockets and 4. The flanges ot' the shell contactsy t against the top walls of the sockets 8 and 4 and insulating disks 31 of grey ber or other suitable material are interposed between the center contacts and the top walls of the sockets to insulate the center contacts from the shell contacts. The

lshell contacts and the disks 31 are placed connect the shell contacts with each other and current will pass through the shell contacts and the terminal conductor bar 10 as will be readily understood. The outer ends of the sockets 3 and 4 are interiorlyilared at 34 and are provided with exterior circumferential beads 35.v

It will be clear that the insulating body o f the double socket may be molded ot a single piece of bakelite and the conductor bars and connecting yoke andV bushing em bedded therein as inserts and that the parts may be rapidly and conveniently assembled and'that the arcuate ribs which t in the curved slots of the flanges of the shell contacts will interlock the shell contacts with the insulating body and prevent Vany rel-V` ative rotary movement so that there will be no liability of the electrical connection between. the shell contacts being effected by screwing lamps and removing them from the sockets as there will be no liabilityof such rotary movement of the lamps producing a rotary movement of the shell contacts.

The sockets are also provided at their top walls with studs or projections 36 which t in pertorations 87 of the flanges of the shell contacts and cooperate with the arcuate ribs in interlocking the shell contacts-with the insulating body.

What is .claimed is: r- I1. double lamp socket including an insulating body consisting of a single piece of molded material and comprising a solid upper portion and downwardly diverging hollow cylindrical sockets and provided at the top walls of the said sockets with arcuate ribs and having studs spaced from the ribs7 shell contacts arranged in the sockets and provided with anges having apertures re'- ceiving the ribs and the studs whereby the shell contacts are interlocked against rotary movement, a straight vertical terminal conductor bar having its lower portion embedded in the solid portion of the body and provided with a horizontal yoke also embedded in the body at the solid portion thereof and having its terminals prejecting at the top walls of the sockets, center contacts secured to the ends of the yoke, insulating disks interposed between the center contacts and the flanges of the shell contacts, a terminal conductor bar having a straight vertical upper portion, an angularly related intermediate portion and lower portion embedded in the solid top portion of the body, the angularly related lower portion being exposed at one of the said sockets and contacting with the flange of the contact shell thereof.

2. A double lamp socket including an insulating body consisting of molded material and including a solid upper portion Vand hollow cylindrical sockets and provided at the top walls of said sockets 'with arcuate shaped ribs and having studs spaced from the ribs, shell contacts arranged in the sockets and having apertures receiving the ribs and the studs whereby the shell contacts are locked against rotary movement, a terminal conductor bar having a portion embeded in the body and provided with a horizontal yoke also embedded in the body and having its terminals projecting at the top 10 Walls of the sockets, center contacts secured to the ends of the yoke, insulating disks interposed between the center contacts and the shell contacts, a terminal conductor bar having its inner end terminating at and eX- posed at one of the said sockets and contacting with the respective contact shell.

In testimony whereof I have hereunto set my hand.

WILLIAM ILE. 

